如何解决参数数量不足或找不到条目的问题。或者,运行 'webpack(-cli) --help' 以获取使用信息

dmc*_*c94 10 webpack babeljs

我得到的错误Insufficient number of arguments or no entry found. Alternatively, run 'webpack(-cli) --help' for usage info.,当我运行命令npm run dev我也收到这下一个一个错误,指出ERROR in Entry module not found: Error: Can't resolve后跟路径。我不太确定为什么它找不到入口点任何帮助将不胜感激。

将整个项目上传到 github 以帮助提高可见性。 https://github.com/dustinm94/coding-challenge

webpack.config.js

  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: "babel-loader"
        }
      }
    ]
  }
}
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包.json

{
  "name": "coding_challenge",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "dev": "webpack --mode development --watch ./coding/frontend/src/index.js --output ./coding/frontend/static/frontend/main.js",
    "build": "webpack --mode production ./coding/frontend/src/index.js --output ./coding/frontend/static/frontend/main.js"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "@babel/core": "^7.4.0",
    "@babel/preset-env": "^7.4.2",
    "@babel/preset-react": "^7.0.0",
    "babel-loader": "^8.0.5",
    "babel-plugin-transform-class-properties": "^6.24.1",
    "webpack": "^4.29.6",
    "webpack-cli": "^3.3.0"
  },
  "dependencies": {
    "babel-preset-react": "^6.24.1",
    "prop-types": "^15.7.2",
    "react": "^16.8.6",
    "react-dom": "^16.8.6"
  }
}
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.babelrc

{
  "presets": ["@babel/preset-env", "@babel/preset-react"],
  "plugins": ["transform-class-properties"]
}
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div*_*ine 12

下面提到了对您的问题的修复

webpack.config.js并且package.json将始终在您的项目基本路径中,节点命令应从此路径触发

您必须在webpack.config.js& 中进行以下更正package.json

包.json

--watch将自动查找entryobject in 中指定的文件,webpack.config.js并继续观察其依赖关系图以在检测到更改时自动重新加载。您需要package.json使用以下详细信息更新您的

"scripts": {
    "webpack" : "webpack", // invoke this command from npm run dev & npm run build
    "dev": "npm run webpack -- --mode development --watch",
    "build": "npm run webpack -- --mode production"
}
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在监视模式下运行可能会导致性能问题,具体取决于您使用的硬件,阅读更多相关信息

webpack.config.js

entry对象添加到您的webpack.config.js. 如果你没有覆盖 entry 对象,默认情况下,webpack 将entry对象指向 './src/index.js`。由于您没有在项目中使用默认配置,webpack 会抛出错误

ERROR in Entry module not found: Error: Can't resolve './src' in '/root/../coding_challenge'
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要修复错误,您需要entry使用目标js文件覆盖对象,如下所示

module.exports = {
  entry : "./frontend/src/index.js",
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: "babel-loader"
        }
      }
    ]
  }
}
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如果完成上述更正,

npm run dev 将以监视模式运行您的项目

npm run build 将为您的项目生成生产版本

如果此信息能解决您的问题,请告诉我